ESPE Abstracts (2014) 82 P-D-2-2-302

Plasma 25-OH Vitamin D and pth Concentrations in Cord Blood: relationship with Ethnic Groups, Nutritional Habits and Degree of Maternal Sun Exposure

Sandra Ortigosa Gómeza, Oscar Garcia Algara, Antonio Mur Sierraa, Roser Ferrer Costab, Antonio Carrascosa Lezcanob & Diego Yeste Fernándezb


aParc de Salut Mar, Barcelona, Spain; bHospital Vall d’Hebron, Barcelona, Spain


Introduction: Several studies showing a high prevalence of vitamin D deficiency in pregnant women have been published in recent years. Vitamin D deficiency during pregnancy has been related to adverse events both in mother and child. Plasma 25-OH vitamin D (25(OH)D) levels in the newborn are dependent on maternal deposits and show a close correlation with maternal levels; thus, neonates of vitamin D-deficient mothers present a greater risk of hypocalcaemia, rickets and a higher incidence of infections during the first year of life, particularly if exclusively breastfed without vitamin D supplementation.

Subjects and methods: Between March and May 2013, 99 pregnant women in whom plasma 25(OH)D by chemoluminescence and PTH by (LIAISON® N-TACT® PTH II Assay) levels were measured in cord blood at birth. Clinical history data of the mothers and neonates were collected and a nutritional survey was made on maternal vitamin D and calcium intake and degree of sun exposure.

Results: Race distribution was: 45% Caucasian, 24% IndoPakistani, 20% SouthAmerican, 11% others. Mean 25(OH)D value in cord blood was 10.4±6.1 ng/ml. Vitamin D deficiency (25(OH)D<20 ng/dl) was present in 94% of pregnant women. Mean PTH value in cord blood was 6.1±2.5 pg/ml and did not correlate with 25(OH)D. Vitamin D and calcium intake was considered adequate in the majority of mothers although sun exposure was deemed deficient in 47%. Vitamin D levels in cord blood were significantly related to race, skin type, degree of sun exposure, use of traditional dress and vitamin D and calcium intake.

Conclusions: The prevalence of vitamin D deficiency in pregnant women was very high after the winter months and consequently in their offspring. Thus, the administration of vitamin D supplements should be indicated during pregnancy.

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